Controllable X-Ray Pulse Trains from Enhanced Self-Amplified Spontaneous Emission
Journal Article
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· Physical Review Letters
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- SLAC National Accelerator Lab., Menlo Park, CA (United States); SLAC National Accelerator Laboratory (SLAC)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Q-Peak, Inc, Bedford, MA (United States)
- Argonne National Lab. (ANL), Lemont, IL (United States)
Here, we report the demonstration of optical compression of an electron beam and the production of controllable trains of femtosecond, soft X-ray pulses with the Linac Coherent Light Source (LCLS) free-electron laser (FEL). This is achieved by enhanced self-amplified spontaneous emission (ESASE) with a 2~ μ m laser and a dechirper device. Optical compression was achieved by modulating the energy of an electron beam with the laser and then compressing with a chicane, resulting in high current spikes on the beam which we observe to lase. A dechirper was then used to selectively control the lasing region of the electron beam. Field autocorrelation measurements indicate a train of pulses, and we find that the number of pulses within the train can be controlled (from 1 to 5 pulses) by varying the dechirper position and undulator taper. These results are a step towards attosecond spectroscopy with X-ray FELs as well as future FEL schemes relying on optical compression of an electron beam.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); SLAC National Accelerator Laboratory, Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
- Grant/Contract Number:
- AC02-06CH11357; AC02-76SF00515; SC0007749
- OSTI ID:
- 1765002
- Alternate ID(s):
- OSTI ID: 1811502
OSTI ID: 1774890
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 10 Vol. 126; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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